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Finding the Fourth Proportional to 191.39, 264.13 and 108.50

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Solution

The fourth proportional to 191.39, 264.13 and 108.50 is: 149.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.39 : 264.13 = 108.50 : x
  2. Step 2: Convert to fraction form
    191.39/264.13 = 108.50/x
  3. Step 3: Cross multiply
    191.39x = 264.13 × 108.50
  4. Step 4: Simplify right side
    191.39x = 28,658.11
  5. Step 5: Solve for x
    x = 28,658.11/191.39
  6. Step 6: Final answer
    x = 149.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.